Rhodium(I)-Catalyzed Allenic Carbocyclization Reaction Affording δ- and ε-Lactams
作者:Kay M. Brummond、Thomas O. Painter、Donald A. Probst、Branko Mitasev
DOI:10.1021/ol062842u
日期:2007.1.1
This letter extends the scope of the rhodium(I)-catalyzedallenic Alder-ene carbocyclization reaction to the preparation of delta- and epsilon-lactams from amides. A variety of allenic propiolamides were cycloisomerized to give a number of unsaturated delta-lactams. In addition, allenic propargylamides give good yields of the corresponding epsilon-lactams. Formation of lactams possessing these ring